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Detection of ion content in biodiesel by ion chromatography
  
DOI：10.12166/j.zgyz.1003-7969/2020.10.021
KeyWord:ion chromatography  biodiesel  ion content
FundProject:国家自然科学基金项目（51766007）；云南省自然科学基金项目（2018FB092）；NSFC云南联合基金项目（U1602272）；省部共建复杂有色金属资源清洁利用国家重点实验室自设项目（CNMRCUTS1704）
Author NameAffiliation
ZHOULi Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology,Kunming 650093, China 
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Abstract:
      An ion chromatography system with on-line matrix removal function was developed for the rapid and efficient determination of six cations, six anions and three organic acid radical ions in biodiesel. The results showed that the method had high linear correlation and low detection limit, the relative standard deviation of the average retention time was less than 1%, and the precision was high. High recovery rate was obtained when the oil sample was pretreated by two steps of water bath and separating funnel. The highest mass concentration of the analyte was obtained when the extraction times was 5.
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